The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a _________________?
Correct answer: B. two-phase winding
- A. single-phase winding
- B. two-phase winding
- C. three-phase winding
- D. any of the above
Explanation
A phase-shifting transformer for an A.C. potentiometer generally uses two stator windings displaced by 90 electrical degrees, allowing the phase of the output voltage to be varied. Hence, the stator has a two-phase winding.
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